Week - 3 Drop test Challenge

Aim:To observe the collision of aluminum alloy plate with steel ball at different velocities and find out the total deformation.Solution:Step 1:Model a plate with dimension 100*100*5 mm and a steel ball of diameter 10mm which are 10mm apart. Mesh these components using ANSA and output as key file.Step 2:Open LS Prepost…

AIM: To simulate a bird strike on an aircraft blade using ls dna explicit solver, which comes under classic nonlinear transient dynamic problem. We call collisions between a bird and aircraft as a “bird-strike events,” and they are quite common and dangerous. According to the Federal Aviation Administration…

AIM: To create various joints such as revolute, spherical, translational, rotational, locking, cylindrical between two rigid and deformable bodies and simulate their relative motion between the bodies. Procedure: Spherical Joint between two rigid bodies: A ball and socket model has been created using ANSA and it is imported…

AIM: To use the given true stress-strain curve of graphite iron casting and develop the material card using either MAT_024 or MAT-018 in lsdyna. Then simulate the dog bone specimen and compare the stress-strain curve obtained from simulation result to the actual stress-strain curve. SOLUTION: The below shown image is the…

AIM: To reduce the run time of the model using mass scaling methods. Also run the same model using implicit solver and compare the implicit and explicit run time. Explicit Solver:  It is a time dependent solver. The central difference method is used to calculate the field variables at the respective nodal points in…

AIM: To perform the impact simulation of a child's head hitting bonnet of a car. This simulation is done in three different case. Case 1: A simple head model creating impact with rigid wall Case 2: A pedestrian head model creating impact with rigid wall. Case 3: A pedestrian head model creating impact with the bonnet of…

AIM: To create a solid cube with dimension 10 X 10 X 10mm in all direction. Ogden material is used which is a hyper elastic material. An uniaxial tensile loading is performed. One end of the box is constrained in x direction and the other is applied with displacement. While defining the section for this solid part, four…

AIM: To model the spotweld for the given brackets with beam element and hexa_solid element and then compare the results bewteen them. Given model: PROCEDURE: Creating Beam element: Go to mesh>element generation>beam>two node sets>select the two nodes click create and done. Symmetrically generate the beam elements…

AIM: To simulate the crash test for crash box under two different cases. First case with 1.2mm thickness and the second case with 1.5mm thickness and compare the results of both the cases. GIVEN FEA MODEL: PROCEDURE: Open the given keyword file, fea model of crash box will be there. First we need to create the rigid wall…

AIM: To extract mid surface and create 2d mesh elements based on the given quality criteria with better mesh flow. GIVEN CAD COMPONENT: PROCEDURE: Divide the given component into four sub components as it is very big. Now select only one component and hide the remaining components. Now go to wireframe mode to check the…

AIM: To perfrom a drop test of the cell phone on to the floor. PROCEDURE: Open the keyword file and there will be 2 solid component(cell phone and floor) and 1 shell component(floor). As the solid component has more number of nodes the computation time tend to increase, for that we delete the solid and uses the shell floor…

AIM: To solve the problem and derive solutions using explicit and implicit methods(have a tolerence of 0.001). EXPLICIT ANALYSIS: Explicit and implicit techniques are methodologies in numerical analysis that are used to derive numerical approximations to the solutions of time-dependent ordinary and partial differential…

AIM: To convert the unit from SI standards to other unit system which is mentioned below. Kg cm ms Kg cm s gm mm ms kg m s g cm s g cm us g mm s ton mm s slug ft s kg mm s g cm ms kg mm ms EXPLANATION: Conversion from SI unit system to  gm/mm/ms unit system: Mass: 1 kg = 1000 g Length: 1 m = 100 cm Time:…

AIM: To extract midsurface and perform 2D meshing for the given components based on the given quality criteria and then perform connections based on the given criteria. PROCEDURE: Import the given geometry and then perform the geometrical check and prepare the geometry for meshing. Now go to preferences>criteria file…

AIM: For the given three model create 3D mesh based on the given criteria. GIVEN MODEL 1: PROCEDURE: The criteria given for this model is first perform 2D meshing based on the quality criteria given, after that convert the 2D elements into 3D elements using 3D>Tetramesh option. First check the geometry and clear the…

NOTE: I belongs to fast track 21 program on Hypermesh course. As requested by instructor, i have done extracting midsurface and meshing on inner_extract and Latch_reinforcement_extract alone.  AIM: To extract the mid surface for the given components and perform 2d meshing on the midsurface based on the given quality criteria…

AIM: To check the geometry errors and mesh with the given quality criteria for the given CAD model and to assign thickness for the mid surface component. It is mentioned that mid surface is extracted only for components less than 5mm and for the remaining component we need to go for solid meshing. GIVEN CAD MODEL: GIVEN…

AIM:To check the geometry errors and extract mid surface for the given cad component and then mesh the entire component with 2d elements which should satisfies the given quality criteria with good mesh flow. GIVEN CAD MODEL: PROCEDURE: Open Ansa and then open the given model. As you see the extension of the given cad model…

AIM: To extract mid surface for the given cad model and then assign properties and thickness to it. Then create a 2D mesh with the target element size as '5' and create 1D element on the following component with the given cross section and Degree of Freedom. OBJECTIVE: The objective of this challenge is to learn how to…

COMPLETED WITHIN 4 HOURS

So for model 1 it took around 3 hours to complete the model as it was a uniform thickness component it is easy to offset. For model 2 it took me 8 hours because first i do casting to see the result but the defeaturing is very hard to clear the quality so start from the first with manual offsetting and manual 2d mesh. That…

AIM: To check the geometrical errors and mesh the surface for the given Rear view mirror component under the specified element quality criteria. GIVEN CAD MODEL: PROCEDURE: The given model is in .IGS format, so the model cannot have any connections between the components. After the model is opened go to topo module under…

AIM: To create and apply different PID for the side door component and perform the suitable connections. GIVEN CAD MODEL: PROCEDURE: The given component is in one PID. So the first thing is we need to set PID for each component and no need to assign the thickness. For that use feature option to select the particular entity…

AIM: To do morphing on the given both models and for the model 1 do morphing by using all the technique as you saw in video and for model 2 do morphing only for the specified components in the model. GIVEN CAD MODEL:   PROCEDURE: Since this model is in .igs format we have to perform topo to make the connections between…

AIM: To generate the manual mid surface for the given bottle cap model and assign PID and thickness for the mid surface and mesh the entire mid surface with given mesh quality criteria. GIVEN CAD MODEL: PROCEDURE: After opening the cad model, we have to check the model geometry, for that go to check -->geometry-->execute.…

AIM :        To generate the mid surface for the give model and then generate the mesh for the mid surface which we have generated from the parent geometry. The mesh which is generated should meet the quality criteria given below,                                              PROCEDURE : Import the given model. Open the…